Scheduler.plugin(function(scheduler){
	(function(){


var dhtmlXTooltip = scheduler.dhtmlXTooltip = scheduler.tooltip = {};

dhtmlXTooltip.config = {
	className: 'dhtmlXTooltip tooltip',
	timeout_to_display: 50,
	timeout_to_hide: 50,
	delta_x: 15,
	delta_y: -20
};

dhtmlXTooltip.tooltip = document.createElement('div');
dhtmlXTooltip.tooltip.className = dhtmlXTooltip.config.className;

dhtmlXTooltip.show = function(event, text) { //browser event, text to display
	if (scheduler.config.touch && !scheduler.config.touch_tooltip) return;
	
	var dhxTooltip = dhtmlXTooltip;
	var tooltip_div = this.tooltip;
	var tooltip_div_style = tooltip_div.style;
	dhxTooltip.tooltip.className = dhxTooltip.config.className;
	var pos = this.position(event);

	var target = event.target || event.srcElement;
	// if we are over tooltip -- do nothing, just return (so tooltip won't move)
	if (this.isTooltip(target)) {
		return;
	}

	var offsetleft = 0;
    var offsettop = 0;
	var pobj = scheduler._obj;
	if(pobj.offsetParent) {
		do {
			offsetleft += pobj.offsetLeft;
			offsettop += pobj.offsetTop;
		} while (pobj = pobj.offsetParent);
	}
	
	var actual_x = pos.x + (dhxTooltip.config.delta_x||0) - offsetleft;
	var actual_y = pos.y - (dhxTooltip.config.delta_y||0) - offsettop;

	tooltip_div_style.visibility = "hidden";
	
	if(tooltip_div_style.removeAttribute) {
		tooltip_div_style.removeAttribute("right");
		tooltip_div_style.removeAttribute("bottom");
	} else {
		tooltip_div_style.removeProperty("right");
		tooltip_div_style.removeProperty("bottom");
	}

	tooltip_div_style.left = "0";
	tooltip_div_style.top = "0";
	
	this.tooltip.innerHTML = text;
	document.body.appendChild(this.tooltip);

	var tooltip_width = this.tooltip.offsetWidth;
	var tooltip_height = this.tooltip.offsetHeight;

	if ((scheduler._obj.offsetWidth - actual_x - (scheduler.xy.margin_left||0) - tooltip_width) < 0) { // tooltip is out of the right page bound
		if(tooltip_div_style.removeAttribute)
			tooltip_div_style.removeAttribute("left");
		else
			tooltip_div_style.removeProperty("left");
		tooltip_div_style.right = (scheduler._obj.offsetWidth - actual_x + 2 * (dhxTooltip.config.delta_x||0)) + "px";
	} else {
		if (actual_x < 0) { // tooltips is out of the left page bound
			tooltip_div_style.left = (pos.x + Math.abs(dhxTooltip.config.delta_x||0)) + "px";
		} else { // normal situation
			tooltip_div_style.left = actual_x + "px";
		}
	}

	if ((scheduler._obj.offsetHeight - actual_y - (scheduler.xy.margin_top||0) - tooltip_height) < 0) { // tooltip is below bottom of the page
		if(tooltip_div_style.removeAttribute)
			tooltip_div_style.removeAttribute("top");
		else
			tooltip_div_style.removeProperty("top");
		tooltip_div_style.bottom = (scheduler._obj.offsetHeight - actual_y - 2 * (dhxTooltip.config.delta_y||0)) + "px";
	} else {
		if (actual_y < 0) { // tooltip is higher then top of the page
			tooltip_div_style.top = (pos.y + Math.abs(dhxTooltip.config.delta_y||0)) + "px";
		}
		else { // normal situation
			tooltip_div_style.top = actual_y + "px";
		}
	}
	
	tooltip_div_style.visibility = "visible";

	scheduler.callEvent("onTooltipDisplayed", [this.tooltip, this.tooltip.event_id]);
};
dhtmlXTooltip._clearTimeout = function(){
	if(this.tooltip._timeout_id) {
		window.clearTimeout(this.tooltip._timeout_id);
	}
};

dhtmlXTooltip.hide = function() {
	if (this.tooltip.parentNode) {
		var event_id = this.tooltip.event_id;
		this.tooltip.event_id = null;
		this.tooltip.parentNode.removeChild(this.tooltip);
		scheduler.callEvent("onAfterTooltip", [event_id]);
	}
	this._clearTimeout();
};
dhtmlXTooltip.delay = function(method, object, params, delay) {
	if(this.tooltip._timeout_id) {
		window.clearTimeout(this.tooltip._timeout_id);
	}
	this.tooltip._timeout_id = setTimeout(function(){
		var ret = method.apply(object,params);

		method = object = params = null;
		return ret;
	},delay||this.config.timeout_to_display);	
};

dhtmlXTooltip.isTooltip = function(node){
	var res = false;
	if (node.className.split(" ")[0] == "dhtmlXTooltip") {
		//debugger;
	}
	while (node && !res) {
		res = (node.className == this.tooltip.className);
		node=node.parentNode;
	}
	return res;
};

dhtmlXTooltip.position = function(ev) {
   ev = ev || window.event;
   if(ev.pageX || ev.pageY) //FF, KHTML
      return {x:ev.pageX, y:ev.pageY};
   //IE
   var d  =  ((window._isIE)&&(document.compatMode != "BackCompat"))?document.documentElement:document.body;
   return {
      x:ev.clientX + d.scrollLeft - d.clientLeft,
      y:ev.clientY + d.scrollTop  - d.clientTop
   };
};

scheduler.attachEvent("onMouseMove", function(event_id, e){ // (scheduler event_id, browser event)
	var ev = window.event||e;
	var target = ev.target||ev.srcElement;
    var dhxTooltip = dhtmlXTooltip;

	var is_tooltip = dhxTooltip.isTooltip(target);
	var is_tooltip_target = (dhxTooltip.isTooltipTarget && dhxTooltip.isTooltipTarget(target));

	// if we are over event or tooltip or custom target for tooltip
	if (event_id || is_tooltip || is_tooltip_target) {
		var text;

		if (event_id || dhxTooltip.tooltip.event_id) {
			var event = scheduler.getEvent(event_id) || scheduler.getEvent(dhxTooltip.tooltip.event_id);
			if (!event)
				return;

			dhxTooltip.tooltip.event_id = event.id;
			text = scheduler.templates.tooltip_text(event.start_date, event.end_date, event);
			if (!text)
				return dhxTooltip.hide();
		}
		if (is_tooltip_target) {
			text = "";
		}

		var evt = undefined;
		if (_isIE) {
			//make a copy of event, will be used in timed call
			evt = document.createEventObject(ev);
		}

		if (!scheduler.callEvent("onBeforeTooltip", [event_id]) || !text)
			return;

		dhxTooltip.delay(dhxTooltip.show, dhxTooltip, [(evt||ev), text]); // showing tooltip
	} else {
		dhxTooltip.delay(dhxTooltip.hide, dhxTooltip, [], dhxTooltip.config.timeout_to_hide);
	}
});
scheduler.attachEvent("onBeforeDrag", function(){
    dhtmlXTooltip.hide();
    return true;
});
scheduler.attachEvent("onEventDeleted", function() {
	dhtmlXTooltip.hide();
	return true;
});

/* Could be redifined */
scheduler.templates.tooltip_date_format=scheduler.date.date_to_str("%Y-%m-%d %H:%i"); 

scheduler.templates.tooltip_text = function(start,end,event) {
	return "<b>Event:</b> "+event.text+"<br/><b>Start date:</b> "+scheduler.templates.tooltip_date_format(start)+"<br/><b>End date:</b> "+scheduler.templates.tooltip_date_format(end);
};
})();

});